On June 28, 1919, Germany signed the Treaty of Versailles, officially ending its involvement in World War I. The treaty subjected Germany to a number of harsh penalties and restrictions that many historians believe contributed to the rise of Adolf Hitler.

Last year a remote Chinese village had an outbreak of the pneumonic plague. The plague has been responsible for three recorded pandemics over the last 1,500 years and affects 1,000 to 2,000 people annually.